stage perspective transformation added

1 files changed, 36 insertions, 0 deletions

diff --git a/color_pipe.h b/color_pipe.h
index 9b52f23..26b229b 100644
--- a/color_pipe.h
+++ b/color_pipe.h
@@ -318,6 +318,40 @@ struct trapcorr_data_t {
 
 
 /**
+ * Projective transformation definition 
+ */
+struct projection_data_t {
+	int enable;								///< flag to enable projective transformation
+	void *img_out;							///< projected image. This buffer must be allocated externly.
+	void *img_in;							///< Input image.
+	int is_color;							///< Not 0 if it's a color image
+	int bit_channel;						///< Bits per color channel.
+	int width;								///< image width in number of pixels
+	int height;								///< image height in number of pixels
+	float c_inv[3][3];						///< inverse of 3x3 projection matrix C
+	float c_inv_new[3][3];					///< double buffered matrix
+	int c_upd;								///< projection matrix update flag
+	
+	int map_init;							///< flag indicating transformation map is initialized
+	
+	/**
+	 * projective transfomration map
+	 * A coordinate pair defines the transformed pixel location. It may be shifted (see @ref map_scale_fact).
+	 * 
+	 * This buffer must be allocated externly.
+	 */
+	struct coord_t *map;
+	
+	/**
+	 * Bit shift applied on correction map @ref map.
+	 * The pixel location may lay between a pixel pair. Therefore the coordinates defined at the map
+	 * @ref map are (scaled) shifted by this factor.
+	 */
+	int map_scale_fact;
+};
+
+
+/**
  * Color pipe definition structure holding all memory data from different pipeline
  * stages. This structure and image buffers are allocated dynamically.
  */
@@ -336,6 +370,7 @@ struct color_pipe_t {
 	struct sharp_data_t sharp_data;					///< image sharpening data
 	struct gamma_data_t gamma_data;					///< gamma correction data
 	struct trapcorr_data_t trapcorr_data;			///< isosceles trapezoid correction data
+	struct projection_data_t proj_data;				///< projective transformation data
 };
 
 
@@ -356,6 +391,7 @@ void __stdcall color_pipe_stageconf_color_calib(struct color_pipe_t *color_pipe,
 void __stdcall color_pipe_stageconf_sharp(struct color_pipe_t *color_pipe, int enable, float factor, enum sharp_alg_t alg, float sens);
 void __stdcall color_pipe_stageconf_gamma(struct color_pipe_t *color_pipe, int enable, float gamma);
 void __stdcall color_pipe_stageconf_trapcorr(struct color_pipe_t *color_pipe, int enable, float wv, float wh);
+void __stdcall color_pipe_stageconf_projection(struct color_pipe_t *color_pipe, int enable, float c_inv[3][3]);
 
 #if defined(__cplusplus) || defined(c_plusplus)
 } // extern "C"